Saâdia Khoukhi, Othmane El Yaakoubi, Chakib Bojji, Y. Bensouda
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A genetic algorithm for solving a multi-trip vehicle routing problem with time windows and simultaneous pick-up and delivery in a hospital complex
This paper addresses the multi-trip vehicle routing problem with time windows and simultaneous pick and delivery, in which a set of hospitals have to be visited by a fleet of homogeneous vehicles. The objective is to minimize the total cost that includes the traveling cost and the fixed cost of using vehicles, without violating temporal and capacity constraints. As for the solving approach, a genetic algorithm based on route-first cluster-second approach and splitting procedure is introduced. Then crossover and mutation operations are deployed to ensure the exploration and the diversity of the population. The proposed approach is tested on a set of instances from the literature.